The outcome of FPTP-voting is naturally a two party system, the ancient wealthy romans designed it so deliberately in order for them to easily manipulate regardless of election outcomes to maintain their wealth and power. Everywhere it is used politics degenerate into voters being reduced to pick between “business as usual” and “tax cuts for the rich.” Wealthy donors play both horses and don’t really care about the outcome except when some progressive candidate appears and they find themselves forced to run some interference behind the scenes to help even the odds back to the usual bread and circus’ that they prefer.